The present invention provides probiotic compositions for consumption by bothanimals and humans for augmenting kidney function. The probiotic compositionsare efficacious in removing toxic nitrogenous by-products and inhibiting theovergrowth of undesirable bacteria. The compositions of the present inventionare also useful for restoring or maintaining gastrointestinal health anddelaying the onset of illness in patients with metabolic syndromes such asborderline diabetics or hypertension.